First and foremost, Wayne Schuett in Oostburg - if he still lives there, I've been trying to get in touch with him to little avail, but you should try to look him up. He is (was) an absolute magician as a manufacturer, smithy, and as a refinisher. He is a Colorado School of Trades graduate.
I also had some beautiful polish and bluing work done by Jack Ladwig, who should still be working for Badger Guns and Ammo in Milwaukee (maybe West Allis?) He moved to Badger when Flintrop's shut down...
Good luck